Title :
Reliability-based design optimization of stiffened panels
Author :
Qu, Xueyong ; Haftka, Raphael T.
Author_Institution :
Dept. of Mech. & Aerosp. Eng., Florida Univ., Gainesville, FL
Abstract :
We explore reliability-based designs of isogrid stiffened panels. Uncertainties in material properties and geometric manufacturing uncertainties are represented by random variables. Due to the multiple failure modes in the stiffened panels, polynomial response surface approximation are fit to the most critical safety margins in the panel. Probability of failure is calculated by Monte Carlo simulation using the polynomial response surfaces. A probabilistic sufficiency factor approach is employed to facilitate the design optimization
Keywords :
Monte Carlo methods; computational geometry; failure analysis; materials properties; optimisation; polynomial approximation; probability; product design; reliability; response surface methodology; uncertainty handling; Monte Carlo simulation; critical safety margins; design optimization; geometric manufacturing uncertainties; isogrid stiffened panels; material properties; polynomial response surface approximation; probabilistic sufficiency factor approach; random variables; reliability-based designs failure probability; Design optimization; Manufacturing; Material properties; Polynomials; Probability; Random variables; Response surface methodology; Safety; Surface fitting; Uncertainty;
Conference_Titel :
Uncertainty Modeling and Analysis, 2003. ISUMA 2003. Fourth International Symposium on
Conference_Location :
College Park, MD
Print_ISBN :
0-7695-1997-0
DOI :
10.1109/ISUMA.2003.1236176
